Abstract: The desulfurization performance of several extraction agents were studied using industrial pentane as feed under the conditions of an extraction temperature of 15℃, a settling time of 15 min and an agent to oil ratio of 1. Test results indicated that: (1) As to single extraction agent, furfural and NaOH solution are preferred, which can reduce the sulfur content of pentane from 40.3 mg/L to 1.0 mg/L; (2) 5%NaOH solution and 95% ethanol could be formed composite agent in rather wide volume ratios, which can reduce the sulfur content of pentane to 1.0 mg/L; (3) Composite agent of DMF and 5%NaOH mixing with a volume ratio of 1 can reduce the sulfur content of pentane to 1.0 mg/L, yet exceeded amount of DMF in composite agent might suppress the removal of sulfides from pentane.

Key words: pentane, vesicant, extractor, desulfurization